Antifreeze (engine) - Hutchinson encyclopedia article about Antifreeze (engine) Printer Friendly
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antifreeze
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    Also found in: Medical, Encyclopedia, Wikipedia 0.12 sec.

antifreeze

Substance added to a water-cooling system (for example, that of a car) to prevent it freezing in cold weather.

The most common types of antifreeze contain the chemical ethylene glycol, or (HOCH2CH2OH), an alcohol with a freezing point of about −15°C/5°F.

The addition of this chemical depresses the freezing point of water significantly. A solution containing 33.5% by volume of ethylene glycol will not freeze until about −20°C/−4°F. A 50% solution will not freeze until −35°C/−31°F.



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